Patent US2297245A successfully refreshed from Google Patents.
Patent US3626830A successfully refreshed from Google Patents.
US3626830A
Expired / Lapsed
US
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Character viewing and reproducing apparatus for a photocomposing machine
Assignee: Olympia Werke AG
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Filing: 1969-06-20
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Granted: 1971-12-14
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Expires: 1989-06-20
Abstract
Abstract Light pulses in the form of selected character images are retained by a luminescent layer which is activated by the illuminated portion of a superimposed photoconductive layer onto which the character images are projected. Due to feedback from the luminescent layer to the photoconductive layer, the character image is retained for viewing as long as a voltage is applied to the superimposed layers. The character is also projected onto a record carrier which receives a light pulse only when a shutter is operated after the correctness of the selected character has been determined by viewing the character image, which is then erased.
Inventors
- 👤 Dieter Sobottka
- 👤 Rolf Gruner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:08
CPC Classifications
B; B41; B41J; B41J19/00; B41J19/18; B41J19/20; B41B; B41B17/00; B41B19/00; B41B21/00; B41B21/16; B41B23/00; B41J2/00; B41J2/435; B41J2/465; B41J2/4655; B41J3/00; B41J3/44; B41J3/46
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
226 words
Character viewing and reproducing apparatus comprising a series of selector means representing a series of alpha-numerical characters; character reproducing means operated by said selector means to transmit light pulses in the shape of selected character images of said series along first and second paths; supporting means for supporting a photosensitive record carrier sheet in said first path between said supporting means with said record carrier sheet and said character reproducing means; a photoelectric storage and viewing device having terminals for being energized, and located in said second path so as to be illuminated by light pulses representing selected character images, said storage and viewing device retaining, while energized, said character images for viewing after termination of the respective light pulses; and control means for connecting said terminals with a voltage during successive operatioNs of said selector means so that the character images can be viewed for a desired time whereby after said viewed character images have been found correct, said shutter can be operated to effect on said record carrier sheet, photographic reproduction of selected character images projected along said first path while said control means connects said terminals with said voltage; said control means being operable to disconnect said voltage from said terminals so that said storage and viewing device is deenergized and said retained characters are erased after reproduction on said record carrier sheet.
Claim 2
Dependent Claim
226 words
Character viewing and reproducing apparatus comprising a series of selector means representing a series of alpha-numerical characters; character reproducing means operated by said selector means to transmit light pulses in the shape of selected character images of said series along first and second paths; supporting means for supporting a photosensitive record carrier sheet in said first path between said supporting means with said record carrier sheet and said character reproducing means; a photoelectric storage and viewing device having terminals for being energized, and located in said second path so as to be illuminated by light pulses representing selected character images, said storage and viewing device retaining, while energized, said character images for viewing after termination of the respective light pulses; and control means for connecting said terminals with a voltage during successive operatioNs of said selector means so that the character images can be viewed for a desired time whereby after said viewed character images have been found correct, said shutter can be operated to effect on said record carrier sheet, photographic reproduction of selected character images projected along said first path while said control means connects said terminals with said voltage; said control means being operable to disconnect said voltage from said terminals so that said storage and viewing device is deenergized and said retained characters are erased after reproduction on said record carrier sheet.
Claim 3
Dependent Claim
16 words
An apparatus as claimed in claim 1 wherein said control means include manually operated switch means.
Claim 4
Dependent Claim
48 words
An apparatus as claimed in claim 1 wherein said character reproducing means is located between said supporting means and said storage and viewing device, and projects said light pulses in opposite directions toward a record carrier sheet on said supporting means and toward said storage and viewing device.
Claim 5
Dependent Claim
15 words
An apparatus as claimed in claim 1 wherein said first and second paths are aligned.
Claim 6
Dependent Claim
36 words
An apparatus as claimed in claim 1 wherein said selector means include a keyboard with keys associated with the characters of said series; and wherein said storage and viewing device is located rearward of said keyboard.
Claim 7
Dependent Claim
101 words
An apparatus as claimed in claim 1 wherein said control means include manually operated switch means; wherein said character reproducing means is located between said supporting means and said storage and viewing device, and projects said light pulses in opposite directions toward a record carrier sheet on said supporting means and toward said storage and viewing device; wherein said first and second paths are aligned; wherein said selector means include a keyboard with keys associated with the characters of said series; and wherein said storage and viewing device is located rearward of said keyboard and forward of said character reproducing means.
Claim 8
Dependent Claim
41 words
Apparatus as claimed in claim 1 wherein said storage and viewing device has a height at least equal to the height of one character image, and a width at least equal to the width of a plurality of said character images.
Claim 9
Dependent Claim
61 words
Apparatus as claimed in claim 1 comprising a semitransparent mirror located between said storage and viewing device and said shutter; reflecting means; and a frosted glass plate disposed so that light reflected by said semitransparent mirror is deflected by said reflector means onto said frosted glass plate for observation of the character images retained by said photoelectric storage and viewing device.
Claim 10
Dependent Claim
62 words
Apparatus as claimed in claim 1 wherein said storage and viewing device includes a plurality of storage and viewing means arranged in a common viewing plane; wherein each storage and viewing means has a pair of terminals connected with said control means; and wherein said control means includes switches operable for selectively energizing and deenergizing each of said storage and viewing devices.
Claim 11
Dependent Claim
53 words
Apparatus as claimed in claim 1 wherein said character reproducing means include light guiding means consisting of parallel glass fibers; and wherein the resolution of said glass fibers corresponds substantially to the resolution of said storage and viewing device, each character image being composed of light points respectively associated with said glass fibers.
Claim 12
Dependent Claim
40 words
Apparatus as claimed in claim 1 wherein said storage and viewing device includes a photoconductive layer, a luminescent layer, and terminals in the form of light permeable terminal plates located on opposite sides of the superimposed photoconductive and luminescent layers.
Claim 13
Dependent Claim
146 words
Apparatus as claimed in claim 1 wherein said storage and viewing device includes a plurality of photoamplifier elements arranged in crossing lines, each photoamplifier element including a photoconductive element and a luminescent element, said photoconductive elements forming a first layer and said luminesceNt elements forming a second layer superimposed on said first layer; wherein said character reproducing means projects each character image onto a plurality of said photoconductive elements whereby the electric resistance of the same is reduced; and wherein said terminals are transparent terminal plates between which said first and second layers are located so that illuminated photoconductive elements cause energization of the respective luminescent elements which feed back light to the respective photoconductive elements after termination of said light pulses whereby viewable character images are retained by energized luminescent elements until said voltage is disconnected from said transparent terminal plates by said control means.
Claim 14
Dependent Claim
65 words
Apparatus as claimed in claim 12 wherein said character reproducing means include light guiding means having a plurality of parallel glass fibers disposed in crossing lines and having a size and position corresponding to the size and position of said photoconductive elements so that points of each character image are transmitted from said glass fibers to corresponding photoamplifier elements of said storage and viewing device.
Claim 15
Dependent Claim
39 words
Apparatus as claimed in claim 12 wherein said storage and viewing device includes a diaphragm sheet located between said first and second layers for limiting the amount of light fed back from said luminescent elements to said photoconductive elements.
Claim 16
Dependent Claim
12 words
Apparatus as claimed in claim 14 wherein said diaphragm sheet is translucent.
Claim 17
Dependent Claim
49 words
Apparatus as claimed in claim 14 wherein said diaphragm sheet has an aperture located between each pair of luminescent and photoconductive elements forming a photoamplifier element, the size of said aperture being selected to determine the amount of light fed back from said luminescent elements to said photoconductive elements.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-13 | 1975-06-14 | 1975-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-13 | 1979-06-14 | 1979-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-13 | 1983-06-14 | 1983-12-14 | $7700.00 | Window Closed / Lapsed |